Cd-Free Cu(In,Ga)(Se,S)<sub>2</sub> Thin-Film Solar Cell With Record Efficiency of 23.35%
Motoshi Nakamura, Koji Yamaguchi, Yoshinori Kimoto et al. · 5 Sep 2019
In this article, the excellent properties of state-of-the-art Cd-free Cu(In,Ga)(Se,S) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> (CIGSSe) solar cells with Zn(O,S,OH) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> /Zn <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.8</sub> Mg <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.2</sub> O double buffer layers, deposited by a combination of chemical bath deposition and atomic layer deposition techniques, are presented. By the replacement of conventional CdS buffer…
Achievement of More Than 25% Conversion Efficiency With Crystalline Silicon Heterojunction Solar Cell
K. Masuko, Masato Shigematsu, Taiki Hashiguchi et al. · 10 Sep 2014
The crystalline silicon heterojunction structure adopted in photovoltaic modules commercialized as Panasonic's HIT has significantly reduced recombination loss, resulting in greater conversion efficiency. The structure of an interdigitated back contact was adopted with our crystalline silicon heterojunction solar cells to reduce optical loss from a front grid electrode, a transparent conducting oxide (TCO) layer, and…
24.7% Record Efficiency HIT Solar Cell on Thin Silicon Wafer
Mikio Taguchi, Ayumu Yano, Satoshi Tohoda et al. · 4 Oct 2013
A new record conversion efficiency of 24.7% was attained at the research level by using a heterojunction with intrinsic thin-layer structure of practical size (101.8 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , total area) at a 98-μm thickness. This is a world height record for any crystalline silicon-based solar cell of practical size (100 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"…
Reassessment of the Limiting Efficiency for Crystalline Silicon Solar Cells
Armin Richter, Martin Hermle, Stefan W. Glunz · 10 Jul 2013
Recently, several parameters relevant for modeling crystalline silicon solar cells were improved or revised, e.g., the international standard solar spectrum or properties of silicon such as the intrinsic recombination rate and the intrinsic carrier concentration. In this study, we analyzed the influence of these improved state-of-the-art parameters on the limiting efficiency for crystalline silicon solar…
Strong Internal and External Luminescence as Solar Cells Approach the Shockley–Queisser Limit
Owen D. Miller, Eli Yablonovitch, Sarah Kurtz · 6 Jun 2012
Absorbed sunlight in a solar cell produces electrons and holes. However, at the open-circuit condition, the carriers have no place to go. They build up in density, and ideally, they emit external luminescence that exactly balances the incoming sunlight. Any additional nonradiative recombination impairs the carrier density buildup, limiting the open-circuit voltage. At open circuit,…
